Decoding a dos date

gistfile1.txt

long l = 1078768689;
		
// dosdate spec: http://msdn.microsoft.com/en-us/library/windows/desktop/ms724247(v=vs.85).aspx
		
int year = ((l>>25)&127) + 1980;  // 7 bits
int month = (l>>21)&15;  // 4 bits
int day = (l>>16)&31; // 5 bits
int hour = (l>>11)&31; // 5 bits
int minute = (l>>5)&63;	// 6 bits	
int second = (l&31) * 2;  // 5 bits